How do blind cavefish survive their low-oxygen environment?

How do blind cavefish survive their low-oxygen environment?

Source: University of Cincinnati

3/13/2022

How do blind cavefish survive their low-oxygen environment?

Credit: University of Cincinnati

Now researchers at the University of Cincinnati say these incredible fish have an equally remarkable physiology that helps them cope with a low-oxygen environment that would kill other species.

Biologists in UC’s College of Arts and Sciences found that Mexican cavefish produce more hemoglobin through red blood cells that are much larger compared to those of surface-dwelling fish. Hemoglobin helps the body transport oxygen and carbon dioxide between a fish’s cells and organs and its gills.

The study was published in the Nature journal Scientific Reports. It demonstrates how much more there is to learn about animals that have intrigued biologists for 200 years.

“I’ve been fascinated by these fish for a long time,” UC associate professor Joshua Gross said.

Cavefish evolved in caverns around the world. The species UC biologists examined, Astyanax mexicanus, diverged as recently as 20,000 years ago from surface fish still found in nearby streams in Sierra de El Abra, Mexico.

Continue...

News Id		Source	Stamp	country
3526	Montana’s Famed Trout Under Threat as Drought Intensifies	dnyuz	2021-07-23	US
3527	Climate crisis threatens access to nutrients in fish, study finds	theguardian	2021-07-20	UK
3528	Britain's rarest freshwater fish flourishing in southern Scotland	itv	2016-10-21	UK
3529	Dam Operator Accused of Killing Thousands of Fish in Maine	mainepublic	2016-10-19	US
3530	Danish anglers enlisted to catch rainbow trout accidentally released from fish farm	abc	2016-10-12	DM
3531	Up to 80,000 Trout Escape After Cargo Ship Crashes Into Fish Farm in Denmark	gcaptain	2016-10-11	DM
3532	Grizzly bear uses unusual diving technique to catch salmon	upi	2016-10-06	CA
3533	Angler catches fish with drone on first attempt in brilliant footage showing technology's place in sport	mirror	2016-10-07	UK
3534	Giant 7ft tuna fish spotted in a British river 30 miles from the sea is so big its finders first thought it was a cow	dailymail	2016-09-26	UK
3535	Lion Fish spearfish competition hopes to slow growth of invasive species	mynbc15	2016-09-23	US
3536	These fish sing only at night. But why?	csmonitor	2016-09-22	US
3537	Environmental group says genetically inferior fish wreak havoc on wild salmon	CBC News	2016-09-21	CA
3538	Group helps Vietnam veteran get final wish: One last fish	NBC News	2021-07-12	US
3539	Watch Thousands of Fish Get Dropped From a Plane Into a Utah Lake	gizmodo	2021-07-13	CA
3540	Boise 9-year-old lands 8-foot fish on Snake River	idahostatesman	2016-09-15	US
3541	The Alabama sturgeon lives! Feared extinct, fish's DNA rediscovered in Alabama River	Alabama sturgeon	2016-08-30	US
3542	Legendary 600-lb ‘Pig Nose’ fish caught by B.C.’s sturgeon whisperer	globalnews	2016-08-24	CA
3543	How do you stop invasive lionfish? Maybe with a robotic zapper	Science	2016-08-24	CA
3544	'Who we are:' Teslin Tlingit harvest first salmon in 17 years	CBC News	2016-08-12	CA
3545	Illinois DNR looking to enlist “river monster” to battle Asian carp in Mississippi and other rivers	wqad	2016-07-29	US
3546	Fisherman Faces Felony Charge in Alleged Fish Fraud Case	necn	2016-07-28	US
3547	В Сызрани поймали сома больше человеческого роста	tvzvezda	2021-08-04	RU
3548	Extreme heat will soon kill nearly all young salmon in one California river	wbaltv	2021-07-14	US
3549	Looked like a whale in the back of the boat	foxnews	2021-07-14	US
3550	The Mystery at the Base of One of Biology’s Strangest Relationships	theatlantic	2021-07-14	US

141 of [218 - pages.]